Light Up Flower Headbands + Outdoor Summer Concerts = An Unforgettable Good Time. The Rich Red LED Flower Crown Halo Headband is a fun, rockin' accessory for Summer Music Festivals Clubs, Day of the Dead celebrations & festivals. The headband is also bendable and can be shaped to fit any size head. To activate, simply remove pull-tab from the battery house and flip the switch. 1 Function: Red Still Light. Dimensions: Approx. 7.5" Wide --Adjustable for all size heads. LED Colors: 12 Red Includes 2 pre-installed, replaceable CR2032 Batteries.